Electric clock



3 Sheets-Sheet 1.

Patented Feb. 13, 1883.

D. VP. SWEET. ELECTRIC CLOCK.

(No Model.)

No. 272, 1 o L CL y 1m `(No Model.) 3 Sheets-Sheet 2.

D. P. SWEET.

ELECTRIC CLOCK.

No. 272,100. Patented Feb.A 1s', 1883.

embed, V2) o@ @m (No Model.) 3v Sheets-Sheet 3.

D. P. SWEET.

ELECTRIC CLOCK.

No. 272,100. Patented Fab. 13,1888.

zijn www, gzawmn y N. PETERS. PhnxwLuwgnpher, Wa-hznglon. 11CA UNITED STATES PATENT OFFICE- D. FRED SAVEET, OF HASTINGS, MGHIGAN.

ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 272,100, dated February 13, 1883.

(No model.)

' To all whom t may concern:

Be it known that I, DANIEL FRED SWEET, of Hastings, iu the county of Barry, and in the State of Michigan, have invented certa-in new and useful Improvements in Electric Clocks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to lthe accompanying drawings, and to the letters of reference'marked thereon, making a part of this specication.

This invention relates to certain iuiprovements in clocks or chronometers ot' that class in which an electro magnet or magnets,in connection with a suitable battery and circuitbreaker, are employed in the place of the usual springs to furnish the motive power .to the mechanism; and it has for its objects, iirst, to provide an improved means for transmitting vthe power induced by au intermittent electrical current through the helices of the magnet or magnets to the clock mechanism second, to provide an improved primary circuit-breaker to be operated by the pendulum, in connection with a suitable battery or electric generator, to establish an intermittent electric current through the helices of an electro magnet or magnetsto operate the clock mechanism third, to provide, in connection with the clock or chronometer mechanism, au improved secondary circuit-breaker, whereby au intermittent electric current may be established to operate a secondary electric clock or a series of the same synchronously, as more fully hereinafter set forth; and, fourth, to provide certain iinprovements in the clock mechanism proper, as more fully hereinafter set forth. These objects I attain bythe mechanism illustrated in the accompanying drawings, in which- `Figure l represents a front elevation of my apparatus, showing the battery and primary connections. Fig. 2 represents a top view ot' the apparatus. Fig. 3 represents a longitudi- 'nal vertical section of the apparatus; Fig. et,

The letter A indicates the snpporting-lmard ofthe apparatus,\vliich is provid ed with a bracket, B, which supports the clock mechanism.

The letter C indicates the frame supporting clock mechanism. the said frame being secured tO the bracket- B in any convenient manner.

The letter D indicates a frame secured to the bracketB, which supports the electro-inagnets E. The said frame D, at it-s upper portion, hasjournaledin ita transverse rock-shaft, F, which is provided with au'arm, G, to lthe ends of which are secured the armatures H, which are so arranged as to vibrate above the poles ot' the magnets, as more fully hereinafter described. The said arm G is provided with an upright standard, I, which is bent at its upper end, and is provided with a lateral pin, K, which is adapted to work between the two tlat spi ings L, secured to a rock-shaft, M, journaled in bearings in the frame C. The said roch-shaft is provided with a lever, N, which at its free end is formed or provided with a bifurcated extension, P, which, during the oscillation of said lever, alternately engages the pallets It of the lever S on the rock-shaft T, and in connection therewith imparts the proper momentum to the pendulum to overcome the friction and maintain iis movement. rEhe rockshat't T is journaled in suitable bearings in the frame G, and is provided with an oscillating arm, U, which has a pin at its extremity engaging the pendulum IV, which is hung upon a spring vibrating support, A', attached to a bracket, B', secured to the supporting-board of the apparatus.

rlhe letter C' indicates a vibrating lever secured to the rock-shaft M. The said lever, at its rear end, is provided with a countcrpoise, D', and at its forward end with two pivot-ed pawls., E', which are adapted to engage alten nately as the lever vibrates the ratchetlwheel F' on the second-hand shaft ot' the clock, so as to move the said ratchet-wheel the extent ot' two teeth at each vibration of the lever.

The letter G' indicates the minute-hand wheel, which is provided with a boss, H', mounted looselyon the second-hand shaft- The said wheel is provided with a series of equidistant pins, sixty in number, and the secondhand shaft is provided with a cam which operates an eccentric-strap, I', to give a reciprocating motion to the rods K', secured to the cam-strap, so as to cause -the said bars to al.

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ternately engage a pin 'on opposite sides ofthe l and thus maintain the oscillation ot' the penduwheel and rotate it to the extent of one pin to give the proper movement to the -miuutehand. The bars are maintained in a horizontal position by means of a bar, L', secured loosely at its lower end to a bar, M', attached to the clock-frame at N', as indicated in Fig. l ofthe drawings. The boss ot' the minute-hand wheel is provided with a cam carrying a reciprocating dog, P', slotted at opposite ends. The said dog is adapted to work across the tace of the hour-hand wheel, which is provided with a suitable sleeve or boss, B'. The said wheel is provided with a series ot' twelve pins, with which the ends ot' the dog are adapted to alternately engage to move the said hour-hand wheel. The dog is held in aliorizontal position by means ot' an arm, S', connected loosely with an arm, T', secured to the frame.

rThe letter U' indicates a wheel mounted on the second-hand shaft. This wheel is notched on its periphery, as indicated by the letter V'.

The letter A2 indicates a pawl secured to a rock'shat't, B2, which carries an arm, G2, the 1ocl;-sliat't.beiiig provided with a spring, D2, by which the pawl is thrown into the notch on the wheel U' once at each rotation of the wheel.

E2 indicates an adjusting-screw mounted in a standard, F2, in such position it may be ad jnsted with respect tothe arm G2 that the said arm will touch the end of the screw each time the pawl drops into the notch in the wheel U' for the purpose of closing an electric circuit, embracing a secondary or series of secondary clocks for the purpose of operating them synchronously with the primary clock.

The letter G2 indicates a plate secured to the lower part ot' the supportiiig-board. The said plate has fulcrumed to it at H2, by means ot' the coiled springs l2, two levers, K2, which are so arranged as to nearly meet at their contiguous ends. These levers are provided with steel plates L2, which are alternately lifted by the friction-wheel M2 on the oscillating collar or ring N2, which is mounted loosely on a boss, P2, secured to the plate G2.

The letter S2 indicates a roch-shall, having a bearing at one end at the center ot' the boss P2, and at the other in the end of an adjustingscrew, T2, passing through the standard U2.

The collar N2 is provided with a pin, V2, which is alternately engaged by the wires W2 on the rock-shaft S2, so as to operate the collar to alternatelylitt the levers K2, as before mentioned.

The letter A" indicates a rod secured to the rock-shaft S2 at one end, the other end being bent, and setting in a slot,l32, in the pendulum, so that it will be oscillated thereby.

Theletter G2 indicatestwo adjustablescrews passing through insulated standards D4, sesured to the plate G2. The said screws are so adjusted that as the levers K oscillate they will come alternately into contact with the said screws, and establish alternately an electric current through lthe magnets of the clock, so to oscillate the bar carrying the magnets,

lum. The standards are connected with the helices ot the magnets by means ot' the wires D3, and the said helices are connected with one pole of' a suitable battery by means of the Wires E2, the other pole connecting with the plate G2 by means ot' a wire, F2.

The operation of my invention is as follows: The oscillations of the pendulum through the primary circuit-breaker alternately magnetize and demagnetize the magnets ot` the clock. This causes the arm carrying the armatures to vibrate,causing the arm .carrying the lateral pin to oscillate. The piu alternately presses upon the springs on the arm oi" the vibrating lever, which in their reverse action operate the lever to keep up the motion of the pendulum. The clock-gearing is operated through the pawls working in the ratchets ol" the secondhand to actuate the respective hands, as be fore mentioned. At each revolution of the notched wheel on the secondhand shalt the second circuit maker and breaker will close the circuit ot' the secondary clocks, operating the same isoehronously with the primary eloclt.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In combination with the electro-magnets and the primary circuit-breaker actuated by the pendulum, the vibrating arm carrying the armatures and a standard, and the vibrating arm provided with springs, the actuating-lever G, and pawls adapted to operate in connection with the first-mentioned standard to give motion to the clock mechanism, substantiallyas specified.

2. In combination with the rock-shaft M, provided with a standard carrying springs, L, adapted to be operated by the standard I, secured to the armatures of the magnets, the lever C', the bii'ureated arm N, attached to the shaft ill, and thc rock-shaft T, carrying a lever, S, and pallets l?, and the pawls E adapted to operate the ratchet-wheel on the second-hand shaft, substantially as speeitied.

il. In combination with the electromagnets, the primary circuit-breaker, consisting ot' the springt'ulcrumcd levers, the oscillating ring mounted ou a boss and provided with frietion wheels, the rock-shaft and rod connected with the pendulum, and 'the pins mounted on the oscillating ring and struck by the arms on the rock-shaft to vibrate the levers and alternately move them out ot' and allow them to come into contact with the adjusting-screws in electric circuit with the magnet, to break and establish a current alternately through the magnets, and a suitable battery and connections, substantially as specified.

lu testimony whereof I attix my signature, in presence of two witnesses,this lst day ot' August, 1881.

D. FRED SWEET. Witnesses:

J. J McUAn'rHY, H. AUBREY ToULMIN.

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